Home >> Jaguar >> 2017 >> XJR L >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Power Steering Control Module (PSCM) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Power Steering Control Module (PSCM) >> Description And Operation >> Power Steering Control Module (PSCM) >> U0300-56 Internal Control Module Software Incompatibility - Invalid/incomplete configuration >> Possible Causes